Chapter 8, Problem 17MCQ

a.

To determine

To state: what does the solution $\left(3,4.05\right)$ mean?

Answer to Problem 17MCQ

The solution $\left(3,4.05\right)$ represents that 4.05 U.S. dollars is approximately equals to 3 euros.

Explanation of Solution

Given:

The equation $y=1.35x$ describes the approximate number of U.S. dollars y that equals to x Euros.Calculation:

The given solution is $\left(3,4.05\right)$ . It means $x=3,y=4.05$

So, for the 3 Euros, the number of U.S. dollars is 4.05.

Hence, the solution $\left(3,4.05\right)$ represents that 4.05 U.S. dollars is approximately equals to 3 euros.

b.

To determine

To find: about how many U.S. dollars is 15 euros.

Answer to Problem 17MCQ

  $\$20.25$

Explanation of Solution

Given:

The equation $y=1.35x$ describes the approximate number of U.S. dollars y that equals to x Euros.Calculation:

The given equation is $y=1.35x$

Now, it has been given that $x=15$

So, substituting the value of x and find the value of y

  $\begin{array}{l}y=1.35\cdot 15\\ y=20.25\end{array}$

So, there are $\$20.25$ in 15 Euros.